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Abstract

This paper reports the reflective features of a water surface covered with an oil film expressed by the dependence of the reflectance on the angle of light incidence and wavelength and film thickness with respect to downward and upward light fluxes. The sensitivity of the shape of these functions on the oil type appears especially strong in case of the upward light fluxes as opposed to downward fluxes.

M. F. Fingas and C. E. Brown, “Review of the visibility of oil slics and oil discharges on water”, in Proc. XXI Arctic and Marine Oilspill Program Technical Seminar (1998).

V. Byfiel and S. Boxal, “Thickness estimated and classification of surface oil using passive sensing at visible and near-infrared wavelength”, in Proc. Of the IEEE International Geoscience and Remote Sensing Symposium (1999).

Born, M.

Boxal, S.

V. Byfiel and S. Boxal, “Thickness estimated and classification of surface oil using passive sensing at visible and near-infrared wavelength”, in Proc. Of the IEEE International Geoscience and Remote Sensing Symposium (1999).

Brown, C. E.

M. F. Fingas and C. E. Brown, “Review of the visibility of oil slics and oil discharges on water”, in Proc. XXI Arctic and Marine Oilspill Program Technical Seminar (1998).

Brown, C.E.

Byfiel, V.

V. Byfiel and S. Boxal, “Thickness estimated and classification of surface oil using passive sensing at visible and near-infrared wavelength”, in Proc. Of the IEEE International Geoscience and Remote Sensing Symposium (1999).

M. F. Fingas and C. E. Brown, “Review of the visibility of oil slics and oil discharges on water”, in Proc. XXI Arctic and Marine Oilspill Program Technical Seminar (1998).

V. Byfiel and S. Boxal, “Thickness estimated and classification of surface oil using passive sensing at visible and near-infrared wavelength”, in Proc. Of the IEEE International Geoscience and Remote Sensing Symposium (1999).

Fig. 2. Dependence of reflectance for perpendicular downward (A) and upward (B) light illuminating a water surface covered with an oil film. Two types of oil: (a) crude Petrobaltic at a temperature of 10°C, wavelength 600 nm (n=1.473, k=0.00006) and (b) crude Romashkino under the same conditions (n=1.488, k=0.00303). Colored lines show the averaged values of reflectance.

Fig. 3. Dependence of reflectance for perpendicular downward (A) and upward (B) light illuminating a water surface covered with an oil film 20 µm thick on wavelengths. Two types of oil: (a) crude Petrobaltic at a temperature of 10°C and (b) crude Romashkino at the same temperature. Colored lines show the averaged values of reflectance. Line ‘c’ represents the reflective features of a clean water surface.

Fig. 4. Dependence of reflectance for perpendicular downward (A) and upward (B) light illuminating a water surface covered with an oil film 20 µm thick on the angle of incidence. Two types of oil: (a) crude Petrobaltic at temperature of 10°C, wavelength 600 nm (n=1.473, k=0.00006) and (b) crude Romashkino under the same conditions (n=1.488, k=0.00303). Line ‘c’ represents the reflective feature of a clean water surface.